April 2018

Yesterday, the U.S. Supreme Court issued two important decisions relating to inter partes review (IPR) proceedings before the Patent Trial and Appeal Board (PTAB) of the U.S. Patent and Trademark Office (PTO).

Oil States Energy Services, LLC v. Greene’s Energy Group, LLC, U.S., No. 16-712, 4/24/2018

In Oil States, the Supreme Court ruled

Since the Federal Circuit’s October 5, 2017 decision in Amgen Inc. v. Sanofi[1] overruling the so-called “newly characterized antigen” test for written description under 35 U.S.C. 112, patent challengers in the pharmaceutical and biotechnology fields have gained powerful tools for attacking antibody claims for lack of adequate written description.  More broadly, patent challengers are